1 files changed, 43 insertions, 0 deletions
diff --git a/support/process_state.h b/support/process_state.h
new file mode 100644
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--- /dev/null
+++ b/support/process_state.h
@@ -0,0 +1,43 @@
+/* Wait for process state.
+   Copyright (C) 2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef SUPPORT_PROCESS_STATE_H
+#define SUPPORT_PROCESS_STATE_H
+
+#include <sys/types.h>
+
+enum support_process_state
+{
+  support_process_state_running      = 0x01,  /* R (running).  */
+  support_process_state_sleeping     = 0x02,  /* S (sleeping).  */
+  support_process_state_disk_sleep   = 0x04,  /* D (disk sleep).  */
+  support_process_state_stopped      = 0x08,  /* T (stopped).  */
+  support_process_state_tracing_stop = 0x10,  /* t (tracing stop).  */
+  support_process_state_dead         = 0x20,  /* X (dead).  */
+  support_process_state_zombie       = 0x40,  /* Z (zombie).  */
+  support_process_state_parked       = 0x80,  /* P (parked).  */
+};
+
+/* Wait for process PID to reach state STATE.  It can be a combination of
+   multiple possible states ('process_state_running | process_state_sleeping')
+   where the function return when any of these state are observed.
+   For an invalid state not represented by SUPPORT_PROCESS_STATE, it fallbacks
+   to a 2 second sleep.  */
+void support_process_state_wait (pid_t pid, enum support_process_state state);
+
+#endif